the conductor. I use Print-Rite compatibles for my Epson I have used them for years and get them for £4 a pair, I buy 10 pairs at a time for the kids.
The site GSM Super Star mentioned I can get
3 pairs for £10.54 with free 2nd class shipping, I ordered 6 pairs, will do for the kids for the price, it is a well laid out site too GSM, might try one myself to see what the quality is like.

That is not so in my case - guess it all depends on what printer you have and what application you are printing. I do high presentation work mainly and have yet to find a compatible that is as good as the original.
Let's take an example - I currently have the Epson C80 on the bench:

Admittedly there is a £1-41 delivery charge but when I use this option, the parcel still arrives the next morning, even when I have ordered late afternoon! So, as I said it all depends on what printer. Im not argueing that one company is better than the other, just in my case this is not so. My experiences with compatibles so far have not been good - inconsistent quantities in the cartridges, spluttering on high density printing, one or more inks not appearing to "soak in" to the paper as much as the others leaving a raised amount on the printout. But dont get me wrong - I havent tried Colourjet, I may do on a secondary printer to try them out. Personally, as my presentation has to be consistantly good, I would prefer to stick with the originals for just a couple of pounds more. I suppose if it was for the kids then yes, it makes sense.
Cheers